21919162 has 8 divisors (see below), whose sum is σ = 32903892. Its totient is φ = 10951200.

The previous prime is 21919159. The next prime is 21919169. The reversal of 21919162 is 26191912.

It can be written as a sum of positive squares in 2 ways, for example, as 19989841 + 1929321 = 4471^2 + 1389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21919169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139 + ... + 6622.

Almost surely, 2^21919162 is an apocalyptic number.

21919162 is a deficient number, since it is larger than the sum of its proper divisors (10984730).

21919162 is a wasteful number, since it uses less digits than its factorization.

21919162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8384.

The product of its digits is 1944, while the sum is 31.

The square root of 21919162 is about 4681.7904694679. The cubic root of 21919162 is about 279.8603129773.

The spelling of 21919162 in words is "twenty-one million, nine hundred nineteen thousand, one hundred sixty-two".